(1766–1844), English chemist, father of modern atomic theory. He defined an atom as the smallest part of a substance that could participate in a chemical reaction and argued that elements are composed of atoms. He stated that elements combine in definite proportion and produced the first table of comparative atomic weights.
Definition of Dalton, John in US English:
Dalton, John
proper nounˈdôltn
(1766–1844), English chemist; father of the modern atomic theory. He defined an atom as the smallest part of a substance that could participate in a chemical reaction and argued that elements are composed of atoms. He produced the first table of comparative atomic weights.